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Allan Hills 85085 meteorite (ALH 85085), Allan Hills, Victoria Land, Eastern Antarctica, Antarctica

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Latitude & Longitude (WGS84): 76° 50' 53'' South , 156° 25' 13'' East
Latitude & Longitude (decimal): -76.84833,156.42028
Non-native locality type:Meteorite
Meteorite Type:CH3 chondrite
Köppen climate type:EF : Ice cap climate


Allan Hills 85085 (ALH 85085) is a single small stone (mass, 11.6 g) found in 1985 in Antarctica. Olivine (Fayalite 1-5 mol%) and Pyroxene (Ferrosilite 1-4 mol%) indicated a strongly reduced mineralogy. Its mineralogy, abundant metal, and unusual oxygen-&-nitrogen isotope ratios resulted in its designation as the prototype for the CH (“High metal”) Carbonaceous Chondrites. ALH85085 is one of the few meteorite prototypes not seen to fall. In late 2013 over 20 individual stones (~12-15 original falls??) were listed in Meteoritical Society’s “Meteoritical Bulletin Database. None of them represent observed falls. The CH chondrites have tiny chondrules, tiny inclusions, and abundant metal (~20 vol%). Sulfides are rare.

Mineral List


29 valid minerals. 1 (TL) - type locality of valid minerals.

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Monica M. Grady & C. T. Pillinger (1990). ALH 85085 - Nitrogen isotope analysis of a highly unusual primitive chondrite. Earth and Planetary Science Letters 97, #1-2, 29-40.
- Makoto Kimura, Takashi Mikouchi, Akio Suzuki, Masaaki Miyahara, Eiji Ohtani, and Ahmed El Goresy (2009): Kushiroite, CaAlAlSiO6: A new mineral of the pyroxene group from the ALH 85085 CH chondrite, and its genetic significance in refractory inclusions. American Mineralogist, 94, 1479-1482.
Edward R. D. Scott (1988). A New Kind of Primitive Chondrite: Allan Hills 85085. Abstracts of the Lunar and Planetary Science Conference, vol. 19, p. 1049.
Michael K. Weisberg, Martin Prinz & Cherukupalli E. Nehru (Dec 1990). The Bencubbin chondrite breccia and its relationship to CR chondrites and the ALH 85085 meteorite. Meteoritics 25, (#4), 269-279.

External Links


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